How to modify Origam color schema via CSS

I would like to know how to modify the color scheme of Origam pages using CSS. There are several css files in Application server, but I don’t know the meaning and relation.

The CSS in the assets folder is used only by the login screen and other built-in HTML pages.
In order to change the frontend colors you need to adjust the colors using a screen AsapStyleColor from the Root package.

In order to keep e.g. Test version different color from a Production version you need to script out the AsapStyleColor table and always execute the scripts when importing Production > Test so the Test db will have its colors back.